Portable arm rest



FIG. 1 is a front perspective view of a portable arm rest showing ournew design;

FIG. 2 is a right side elevation, the left side elevation being thesame;

FIG. 3 is a rear view;

FIG. 4 is a front view;

FIG. 5 is a top view; and

FIG. 6 is a bottom view.

The seat fragment depicted by use of broken lines in FIG. 1 is shown forillustrative purposes only.

The ornamental design for portable arm rest, substantially as shown anddescribed.